ISO 12944 - PART 2 PDF Print E-mail
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PART 1		   pagenext
PART 3 & 4		   internallink SISTEM ISO 12944 Ti.Pi.Ci.

 

 

ISO 12944-2 - Environment classification

ISO 12944-2 is about main environment classification where steel structures are exposed to relevant corrosivity. ISO 12944-2 is not about those environment classification with peculiar atmosphere (for example chemical plants or metallurgical’s or around their proximities).

class

Atmospheric environment corrosivity definition:

 

 class

For submerged  or buried structures:
C1 Very low

 

 Im1 Fresh Water
C2 Low

 

 Im2

Salt or Brackish Water (without cathodic protection)
C3

Medium

 

 Im3

Soil
C4

High

 

 Im4

Salt or Brackish Water (with cathodic protection)           

C5 Very High

 

  

 
CX

Extreme

 

  

 

PLEASE NOTE: about most of cases regarding dipping or burial it must be considered it could be applied a cathodic protection to the structures

 

ISO 12944-2 IS NOT ABOUT protective functions for particular strains

PARTICULAR SITUATIONS   PARTICULAR STRAINS
Internal building corrosion   Chemical stress
Corrosion into boxed components   Mechanical stress
    Medium temperature stress (from +60 to +150°C)
    High temperature stress (from +150 to +400°C)
    Condensation stress (continue or long duration)
    Combined stress